Electropneumatic valve



UNITED STATES.

FoaNrA, A CORPORATION or CALIFORNIA. I

" 'ELECTROPNEUMATIC VALVE.

To all whom it may concern:

Be it known that we, EUGENE WIET and Forum CHITTENDEN, citizens of the United States, residing'at the city and count 1 of San Francisco and State of California, ave invented certain new and useful Improvements in ElectropneumaticjValves, of which the following isa specification.

The present invention relatesto an electrically controlled valve mechanism particularly designed for operationagainst a fluid pressure and unseated thereby, the valve being manually moved to closed position and normally maintained in such position by suitable magnetic means. 7

The improved construction is designed particularly for use in signal apparatus, preferably of the whistle or audible type, said signal being sounded while the valve is in open position and until such time as the valve member is manually moved to cut off the flow of fluid supply for operating such signal at which time the electromagnetic means retains the valve in closed position.

With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawings and pointed out in the claim hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claim may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

To more fully comprehend the invention, reference should be had to the accompanying sheet of drawings, wherein- Figure 1 is a view of the preferred embodiment of the invention, illustrating the valve plunger in open position, and disclosing the controlling circuit for energizing the magnet coil.

Fig. 2 is a sectional view taken on line 22 of Fig. 1, illustratin more fully the construction of the valve 0 amber.

Referring more particularly to the drawings, 1 indicates a suitable tubular valve chamber provided with a laterally disposed outlet 2 to which is connected in any suitable manner, as by an elbow.3, a whistle or other fluid operated signal 4 of the audible type. To the lower end of the casing 1 is Specification of Letters Patent. Application filed March 19, 1918.

PATENT OFFICE.

EUGENE WIE'J. m oam: cHITTmvnEN, OF sAn FRANCISCO, CALIFORI-IIA, As- SIGNORS TO. NATIONAL SAFETY APPLIANCE COMPANY, OF SAN FRANCISCO, CALI- S erial No. 223,301.

connected, by suitable couplings 5, a fluid supply connection 6, the flow. ofv fluid, under pressure therefrom into the casing 1 being.

controlled by a service cock 7.

Longitudinally movable within the upper end of the valve casing 1 is a valve plunger 8, having sufiicient, movement said casing to extend, at' its lower or free end below the Patented Oct. 4, 1921.

lateral opening 2 and cut off the flow of fluid through said opening. 7

To the upper 'end' oft-said valve plunger extending exteriorly of said casing is attached through a flexible joint 9, preferably of the ball type, an operating stem 10 movable in guide brackets 11 extending laterally from a guide standard 12, the lower end 13 of which is attached to and is supported by the valve casing 1. The upper end of the stem 10 is provided with a hand engaging portion 14.

Extending parallel with the guide casing 1 and disposed one on either side thereof, are the magnet coils 15 connected by a yoke 16, the ends of said coils being connected in circuit with a batter 17, said circuit being provided with a controlling switch 18 which when closed completes a circuit from the battery 17 to the magnet coils 15, energizing said coils.

An armature 19 is'carried by the stem 10 and the same is adapted on the downward manual movement of the stem 10 to be forced into contact with the energized coils 15 and be retained in said position during such time as the plunger 8 is depressed to cut off the flow of fluid through the lateral opening 2, and thus preclude the operation of the signal 4.

On the interruption of the current from the battery 17 to the coils 15, as by the opening of the switch 18, the coils will be deenergized and the fluid pressure against the lower flat face 20 of the plunger 8 will force said plunger upwardly and open the lateral outlet 2, at which time fluid under pressure will be permitted to pass therethrough and operate the signal 4.

The upward movement of the armature 19 is such as to create a sufficient gap between the armature and the coils 15 to prevent the drawing of the armature into contact with the coils on the closing of the switch 18; thus the signal will be sounded until such time as the stem 10 is manually depressed against the fluid under pressure to force the armature in contact with the' coils 15.

Havingthus described our invention, what we claim as new and desire to protect by Letters Patent is In combination with a valve substantially T formation providedwith an open'ended-bore havingparallel sidewalls and formed intermediate ofiits length with a lateral outlet communicating with said bore, a valve controlled pipe connected to the lower end of said bore for supplying fluid-under pressure to saidzbore, a longitudinally movable valve having parallel side walls received at one endsin the upper end offsai-d bore, said valve being ofa diameter:

to have a sliding fit within the bore with the Walls of saidbore and capable. of movement therein .againstv'fluid pressure-in said bore to extend below said fluid outlet toclose the same, the outer-fend of said valve being casing of formed with a ban end, a name extending parallel with said casing and provided, on I its upper portion'with laterally extended ported guide 'armsoverlying' the upper open end of said bore, 'a longitudinally movable operatingstem extended through said ported arms in alinement with said valve and'pro- .vided at its lower end with a socket for en-. gaging said ball to provide a fiexibjleconnection between-said valve and stem, and electrically operated releasable means associated with said stem for retaining the same in closed position at-one' end of its longitudinal movement in one direction.

In testimony whereof we have signed our of two subscribing witnesses. 7

EUGENE WIET.

Witnessesr- HARRYA.'TQTTE N, Y D. BIorrARDs.

FOREE onrrTENDEN. a l 

